Обсуждение: pgsql: doc: remove URL for ICU explorer/locexp

doc:  remove URL for ICU explorer/locexp

The old URL was HTTP 404 and the git link didn't build.  Also update two
other ICU links.  If we ever get a good link we will add it back.

Reported-by: Anton Voloshin

Author: Laurenz Albe

Backpatch-through: 10

Branch
------
REL_12_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/36b58ac6f6d0c4ce51ffb413ba376c2e8f95126f

Modified Files
--------------
doc/src/sgml/charset.sgml | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)